Updating ignore_prefix to support an array
Updating docs
Ensure backwards compatibility by converting `ignore_prefix` strings to arrays.
Update template.rb

Ensure that the regex to replace paths, always matches from the front of the string.
Fixing tests
Refactored ignore_prefix logic into engine.rb (instead of template.rb). Updated tests.
Merge branch 'feature/ignore_prefix_array_support'

* feature/ignore_prefix_array_support:
  Refactored ignore_prefix logic into engine.rb (instead of template.rb). Updated tests.
  Fixing tests
  Update template.rb
  Ensure backwards compatibility by converting `ignore_prefix` strings to arrays.
  Updating docs
  Updating ignore_prefix to support an array
Comment/Organize Rails Engine initializer